Divisions of pharmacology Clinical pharmacology (in vivo drug action) Toxicology (harmful effect of a drug on body) Pharmacogenetics(genetic variations that alter response of body to drugs) Pharmacogenomics (use genomics approach to identify and characterize new drugs) Neuropharmacology,immunopharmacology, etc (study drug effects in respective systems)Divisions of pharmacology • Clinical pharmacology (in vivo drug action) • Toxicology (harmful effect of a drug on body) • Pharmacogenetics (genetic variations that alter response of body to drugs) • Pharmacogenomics (use genomics approach to identify and characterize new drugs) • Neuropharmacology, immunopharmacology, etc (study drug effects in respective systems)